Shareholder Fees	Jan. 28, 2026 USD ($)
THE GABELLI SMALL CAP GROWTH FUND \| THE GABELLI SMALL CAP GROWTH FUND CLASS AAA
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Exchange Fee	$ 0
THE GABELLI SMALL CAP GROWTH FUND \| THE GABELLI SMALL CAP GROWTH FUND CLASS A
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	5.75%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Exchange Fee	$ 0
THE GABELLI SMALL CAP GROWTH FUND \| THE GABELLI SMALL CAP GROWTH FUND CLASS C
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	1.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Exchange Fee	$ 0
THE GABELLI SMALL CAP GROWTH FUND \| THE GABELLI SMALL CAP GROWTH FUND CLASS I
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Exchange Fee	$ 0
THE GABELLI EQUITY INCOME FUND \| THE GABELLI EQUITY INCOME FUND CLASS AAA
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Exchange Fee	$ 0
THE GABELLI EQUITY INCOME FUND \| THE GABELLI EQUITY INCOME FUND CLASS A
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	5.75%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Exchange Fee	$ 0
THE GABELLI EQUITY INCOME FUND \| THE GABELLI EQUITY INCOME FUND CLASS C
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	1.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Exchange Fee	$ 0
THE GABELLI EQUITY INCOME FUND \| THE GABELLI EQUITY INCOME FUND CLASS I
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Exchange Fee	$ 0
THE GABELLI FOCUSED GROWTH AND INCOME FUND \| THE GABELLI FOCUSED GROWTH AND INCOME FUND CLASS AAA
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Exchange Fee	$ 0
THE GABELLI FOCUSED GROWTH AND INCOME FUND \| THE GABELLI FOCUSED GROWTH AND INCOME FUND CLASS A
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	5.75%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Exchange Fee	$ 0
THE GABELLI FOCUSED GROWTH AND INCOME FUND \| THE GABELLI FOCUSED GROWTH AND INCOME FUND CLASS C
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	1.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Exchange Fee	$ 0
THE GABELLI FOCUSED GROWTH AND INCOME FUND \| THE GABELLI FOCUSED GROWTH AND INCOME FUND CLASS I
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Exchange Fee	$ 0
The Gabelli Global Financial Services Fund \| The Gabelli Global Financial Services Fund CLASS AAA
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Exchange Fee	$ 0
The Gabelli Global Financial Services Fund \| The Gabelli Global Financial Services Fund CLASS A
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	5.75%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Exchange Fee	$ 0
The Gabelli Global Financial Services Fund \| The Gabelli Global Financial Services Fund CLASS C
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	1.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Exchange Fee	$ 0
The Gabelli Global Financial Services Fund \| The Gabelli Global Financial Services Fund CLASS I
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	(2.00%)
Exchange Fee	$ 0

Shareholder Fees

Jan. 28, 2026

USD ($)

THE GABELLI SMALL CAP GROWTH FUND | THE GABELLI SMALL CAP GROWTH FUND CLASS AAA

Prospectus [Line Items]

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

0.00%

Maximum Deferred Sales Charge (as a percentage)

0.00%

Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage)

0.00%

Redemption Fee (as a percentage of Amount Redeemed)